Where: Lewis County, Washington (46.4° N, 123.0° W: paleocoordinates 47.3° N, 109.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cowlitz Formation, Bartonian (41.3 - 38.0 Ma)

• Calcareous nannoplankton most precisely age this unit, placing the Cowlitz fauna in nannoplankton zones NP16 and NP17 (Martini, 1971) and upper CP14 (Oklada and Bukry, 1980), which correlates to the late middle Eocene (40-43 Ma) age (Berggren et al., 1992). Molluscan biostratigraphy suggests a "Tejon" stage age or "Cowlitz-Coaldeo" molluscan stage = Middle Eocene. Collection is assigned to the Bartonian=late Middle Eocene. Collection is from about 15m and 30m above Acutostrea assemblage.

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, medium-grained, shelly/skeletal, green sandstone

Size class: macrofossils

Preservation: cast, mold/impression

Reposited in the UMMP

Collection methods: bulk,

• Collection is presumably reposited in the Museum of Paleontology, University of California collections. Collected in July of 1978 and 1979. Locality has been and continues to be obscured following the May 1980 Mount St Helen's eruption and subsequent landslides and log jams. Collection is more or less equivalent to Weaver's (1937) localities UW 342 and 34.

Primary reference: E. A. Nesbitt. 1995. Paleoecological anlaysis of molluscan assemblages from the Middle Eocene Cowlitz Formation, southwestern Washington. Journal of Paleontology 69(6):1060-1073 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 52207: authorized by Austin Hendy, entered by Austin Hendy on 01.08.2005

Creative Commons license: CC BY (attribution)